05-06-2017
It doesn't like the single quote. It wants to execute Roll.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
What is the & for in Unix?? say for example that you have a line in a shellscript that will startup a executable and you have the ampersand at the end of the line, what is it for??
any info you could spare would be much appreciated
thanks in advance (1 Reply)
Discussion started by: eloquent99
1 Replies
2. Programming
In my program, I'm using argc and argv to accept command line arguments. However, if I have to get the '&' to work i.e. make it run the child as a background process, do I have to write some special code in C or does Unix handle it automatically? If I have to add the special code, how does it look... (2 Replies)
Discussion started by: Legend986
2 Replies
3. UNIX for Dummies Questions & Answers
Hi
I am trying to send mail to an email id having ampersand in it.
Like abc.&.xyz@abc.com
But it is not being sent.
I also tried prefixing backslash before and after ampersand
Need Help:( (17 Replies)
Discussion started by: aniruddha.saha
17 Replies
4. Shell Programming and Scripting
Please explain the usage of ampersand in the following command
who & echo "Total number of users are `who|wc -l`"
What I understand is that ampersand is used to run some process in the background. And, what I am expecting from this command is
"Output of who should be displayed on the... (2 Replies)
Discussion started by: Shan_u2005
2 Replies
5. UNIX for Dummies Questions & Answers
In the terminal, using the ampersand allows the process to run in the background--Emacs, for example. But is there a way to automatically open Emacs as a background process so I can still use the command line? Typing the ampersand is just annoying to me, and I keep forgetting; it's just too useful... (0 Replies)
Discussion started by: Zucriy Amsuna
0 Replies
6. Shell Programming and Scripting
Hi, for my own interest I want to scrape a lot of data off the Maple Story game rankings page.
The problem is, when I want to get the data at this page
maplestory(dot)nexon(dot)net/Rankings/OverallRanking.aspx?type=overall&s=&world=0&job=0&pageIndex=6
It gives me the data at this page
... (3 Replies)
Discussion started by: seagaia
3 Replies
7. Shell Programming and Scripting
Gurus,
Thanks so much for your help, in advance.
I'm using ksh and outputting a literal string value to an output file, however, Unix isn't playing by SQL's rules. The ampersand character which I'm trying to disply as a knowledge base link is screwing up the output. Typically, the "&&" is... (1 Reply)
Discussion started by: WhoDatWhoDer
1 Replies
8. Shell Programming and Scripting
I want to add the character "<" to the end of each line of input using the & function in SED.
Something like:
sed 's/.*/&\</'
It's important to use the &, not another method, because I want to know what I'm doing wrong.
Thanks (5 Replies)
Discussion started by: rlopes
5 Replies
9. Shell Programming and Scripting
Hello everybody,
I have a Problem with sed command.
I want to replace a defined string with a string from a database field (dynamic).
e.g.
sed -i -e 's/%NAME%/'"$HNAME"'/g'
The Problem is that the $HNAME variable can contain Special characters like '&'
e.g.
HNAME="AH Kruger & Co. KG"
... (1 Reply)
Discussion started by: Bambuti2000
1 Replies
10. Red Hat
For years I have spawned shell scripts with nohup and ampersand and they run whether or not I stay logged in. Recently a client told us that we had to set a keep alive timeout on all of our Redhat 7.6 Linux servers. Our sysadmin set the following parameters in the sshd_config file on all of our... (10 Replies)
Discussion started by: gandolf989
10 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS
--debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)